I love my yogurt maker, and the way I use it it is definitely not a single use appliance. 
In fact, I have four distinct uses for mine.
*I use it to make yogurt (of course.)
* I use it to infuse my herbal medicinal oils. It holds at the perfect temperature for a long, slow infusion of medicinal herb properties into oils without damaging or cooking the oil. It works amazingly well with my calendula, St. John's wort, cottonwood, and comfrey oils this year.
* I also make amazing porcini mushroom infused olive oil in the incubator that I use for holiday gifts every year.
* It is the absolute BEST for gently warming and liquefying crystallized honey. Since the yogurt maker stays at a pretty low temp (mine is 110 F) it does not cook the raw honey or destroy the enzymes, which can happen easily if you try to warm honey on the stove.
I have the older Salton that allows you to use a quart mason jar to make yogurt in. (I found the incubators with individual cups to be useless). I don't thing they make it any more, but I did find this yogurt maker, the Yolife:
http://www.healthytraders.com/tribes...10-p-2655.html
If/when my current yogurt makers breaks I have my eye on the Yolife yogurt maker. It can hold three quart jars, which really appeals to me, as we go through a lot of yogurt.